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<a href="triangle3d_8h.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// Copyright (C) 2002-2012 Nikolaus Gebhardt</span>
<a name="l00002"></a>00002 <span class="comment">// This file is part of the &quot;Irrlicht Engine&quot;.</span>
<a name="l00003"></a>00003 <span class="comment">// For conditions of distribution and use, see copyright notice in irrlicht.h</span>
<a name="l00004"></a>00004 
<a name="l00005"></a>00005 <span class="preprocessor">#ifndef __IRR_TRIANGLE_3D_H_INCLUDED__</span>
<a name="l00006"></a>00006 <span class="preprocessor"></span><span class="preprocessor">#define __IRR_TRIANGLE_3D_H_INCLUDED__</span>
<a name="l00007"></a>00007 <span class="preprocessor"></span>
<a name="l00008"></a>00008 <span class="preprocessor">#include &quot;<a class="code" href="vector3d_8h.html">vector3d.h</a>&quot;</span>
<a name="l00009"></a>00009 <span class="preprocessor">#include &quot;<a class="code" href="line3d_8h.html">line3d.h</a>&quot;</span>
<a name="l00010"></a>00010 <span class="preprocessor">#include &quot;<a class="code" href="plane3d_8h.html">plane3d.h</a>&quot;</span>
<a name="l00011"></a>00011 <span class="preprocessor">#include &quot;<a class="code" href="aabbox3d_8h.html">aabbox3d.h</a>&quot;</span>
<a name="l00012"></a>00012 
<a name="l00013"></a>00013 <span class="keyword">namespace </span>irr
<a name="l00014"></a>00014 {
<a name="l00015"></a>00015 <span class="keyword">namespace </span>core
<a name="l00016"></a>00016 {
<a name="l00017"></a>00017 
<a name="l00019"></a>00019     <span class="keyword">template</span> &lt;<span class="keyword">class</span> T&gt;
<a name="l00020"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html">00020</a>     <span class="keyword">class </span><a class="code" href="classirr_1_1core_1_1triangle3d.html" title="3d triangle template class for doing collision detection and other things.">triangle3d</a>
<a name="l00021"></a>00021     {
<a name="l00022"></a>00022     <span class="keyword">public</span>:
<a name="l00023"></a>00023 
<a name="l00025"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#a4626559294771a8a2fb0cbbaedb6c5f9">00025</a>         <a class="code" href="classirr_1_1core_1_1triangle3d.html#a4626559294771a8a2fb0cbbaedb6c5f9" title="Constructor for an all 0 triangle.">triangle3d</a>() {}
<a name="l00027"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#a489813c59bd130d256640ba4e2745505">00027</a>         <a class="code" href="classirr_1_1core_1_1triangle3d.html#a489813c59bd130d256640ba4e2745505" title="Constructor for triangle with given three vertices.">triangle3d</a>(<a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;T&gt;</a> v1, <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;T&gt;</a> v2, <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;T&gt;</a> v3) : <a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>(v1), <a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a>(v2), <a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">pointC</a>(v3) {}
<a name="l00028"></a>00028 
<a name="l00030"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#a1541eda9f2baabc1f23eecb520c6fef2">00030</a>         <span class="keywordtype">bool</span> <a class="code" href="classirr_1_1core_1_1triangle3d.html#a1541eda9f2baabc1f23eecb520c6fef2" title="Equality operator.">operator==</a>(<span class="keyword">const</span> <a class="code" href="classirr_1_1core_1_1triangle3d.html" title="3d triangle template class for doing collision detection and other things.">triangle3d&lt;T&gt;</a>&amp; other)<span class="keyword"> const</span>
<a name="l00031"></a>00031 <span class="keyword">        </span>{
<a name="l00032"></a>00032             <span class="keywordflow">return</span> other.<a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>==<a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a> &amp;&amp; other.<a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a>==<a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a> &amp;&amp; other.<a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">pointC</a>==<a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">pointC</a>;
<a name="l00033"></a>00033         }
<a name="l00034"></a>00034 
<a name="l00036"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#a5a3b0b9e0ae5bc1c4c9bf11c06e9d30d">00036</a>         <span class="keywordtype">bool</span> <a class="code" href="classirr_1_1core_1_1triangle3d.html#a5a3b0b9e0ae5bc1c4c9bf11c06e9d30d" title="Inequality operator.">operator!=</a>(<span class="keyword">const</span> <a class="code" href="classirr_1_1core_1_1triangle3d.html" title="3d triangle template class for doing collision detection and other things.">triangle3d&lt;T&gt;</a>&amp; other)<span class="keyword"> const</span>
<a name="l00037"></a>00037 <span class="keyword">        </span>{
<a name="l00038"></a>00038             <span class="keywordflow">return</span> !(*<span class="keyword">this</span>==other);
<a name="l00039"></a>00039         }
<a name="l00040"></a>00040 
<a name="l00042"></a>00042 
<a name="l00044"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#a9e7a8bba12fb314da35a9c249761a170">00044</a>         <span class="keywordtype">bool</span> <a class="code" href="classirr_1_1core_1_1triangle3d.html#a9e7a8bba12fb314da35a9c249761a170" title="Determines if the triangle is totally inside a bounding box.">isTotalInsideBox</a>(<span class="keyword">const</span> <a class="code" href="classirr_1_1core_1_1aabbox3d.html" title="Axis aligned bounding box in 3d dimensional space.">aabbox3d&lt;T&gt;</a>&amp; box)<span class="keyword"> const</span>
<a name="l00045"></a>00045 <span class="keyword">        </span>{
<a name="l00046"></a>00046             <span class="keywordflow">return</span> (box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#aee439d703d121617c3bd6095c93e6852" title="Determines if a point is within this box.">isPointInside</a>(<a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>) &amp;&amp;
<a name="l00047"></a>00047                 box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#aee439d703d121617c3bd6095c93e6852" title="Determines if a point is within this box.">isPointInside</a>(<a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a>) &amp;&amp;
<a name="l00048"></a>00048                 box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#aee439d703d121617c3bd6095c93e6852" title="Determines if a point is within this box.">isPointInside</a>(<a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">pointC</a>));
<a name="l00049"></a>00049         }
<a name="l00050"></a>00050 
<a name="l00052"></a>00052 
<a name="l00054"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#a37e1822a18d88b08b2f9de9ed7e4ff84">00054</a>         <span class="keywordtype">bool</span> <a class="code" href="classirr_1_1core_1_1triangle3d.html#a37e1822a18d88b08b2f9de9ed7e4ff84" title="Determines if the triangle is totally outside a bounding box.">isTotalOutsideBox</a>(<span class="keyword">const</span> <a class="code" href="classirr_1_1core_1_1aabbox3d.html" title="Axis aligned bounding box in 3d dimensional space.">aabbox3d&lt;T&gt;</a>&amp; box)<span class="keyword"> const</span>
<a name="l00055"></a>00055 <span class="keyword">        </span>{
<a name="l00056"></a>00056             <span class="keywordflow">return</span> ((<a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>.X &gt; box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#a5aad7217e8189f09dde3ec4a69e4ac92" title="The far edge.">MaxEdge</a>.X &amp;&amp; <a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a>.X &gt; box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#a5aad7217e8189f09dde3ec4a69e4ac92" title="The far edge.">MaxEdge</a>.X &amp;&amp; <a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">pointC</a>.X &gt; box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#a5aad7217e8189f09dde3ec4a69e4ac92" title="The far edge.">MaxEdge</a>.X) ||
<a name="l00057"></a>00057 
<a name="l00058"></a>00058                 (<a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>.Y &gt; box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#a5aad7217e8189f09dde3ec4a69e4ac92" title="The far edge.">MaxEdge</a>.Y &amp;&amp; <a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a>.Y &gt; box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#a5aad7217e8189f09dde3ec4a69e4ac92" title="The far edge.">MaxEdge</a>.Y &amp;&amp; <a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">pointC</a>.Y &gt; box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#a5aad7217e8189f09dde3ec4a69e4ac92" title="The far edge.">MaxEdge</a>.Y) ||
<a name="l00059"></a>00059                 (<a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>.Z &gt; box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#a5aad7217e8189f09dde3ec4a69e4ac92" title="The far edge.">MaxEdge</a>.Z &amp;&amp; <a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a>.Z &gt; box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#a5aad7217e8189f09dde3ec4a69e4ac92" title="The far edge.">MaxEdge</a>.Z &amp;&amp; <a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">pointC</a>.Z &gt; box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#a5aad7217e8189f09dde3ec4a69e4ac92" title="The far edge.">MaxEdge</a>.Z) ||
<a name="l00060"></a>00060                 (<a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>.X &lt; box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#a7501c7df834939fa25e5f70b8527e7b5" title="The near edge.">MinEdge</a>.X &amp;&amp; <a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a>.X &lt; box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#a7501c7df834939fa25e5f70b8527e7b5" title="The near edge.">MinEdge</a>.X &amp;&amp; <a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">pointC</a>.X &lt; box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#a7501c7df834939fa25e5f70b8527e7b5" title="The near edge.">MinEdge</a>.X) ||
<a name="l00061"></a>00061                 (<a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>.Y &lt; box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#a7501c7df834939fa25e5f70b8527e7b5" title="The near edge.">MinEdge</a>.Y &amp;&amp; <a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a>.Y &lt; box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#a7501c7df834939fa25e5f70b8527e7b5" title="The near edge.">MinEdge</a>.Y &amp;&amp; <a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">pointC</a>.Y &lt; box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#a7501c7df834939fa25e5f70b8527e7b5" title="The near edge.">MinEdge</a>.Y) ||
<a name="l00062"></a>00062                 (<a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>.Z &lt; box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#a7501c7df834939fa25e5f70b8527e7b5" title="The near edge.">MinEdge</a>.Z &amp;&amp; <a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a>.Z &lt; box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#a7501c7df834939fa25e5f70b8527e7b5" title="The near edge.">MinEdge</a>.Z &amp;&amp; <a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">pointC</a>.Z &lt; box.<a class="code" href="classirr_1_1core_1_1aabbox3d.html#a7501c7df834939fa25e5f70b8527e7b5" title="The near edge.">MinEdge</a>.Z));
<a name="l00063"></a>00063         }
<a name="l00064"></a>00064 
<a name="l00066"></a>00066 
<a name="l00068"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#a0318b5951c702a306223b0dff7c83128">00068</a>         <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">core::vector3d&lt;T&gt;</a> <a class="code" href="classirr_1_1core_1_1triangle3d.html#a0318b5951c702a306223b0dff7c83128" title="Get the closest point on a triangle to a point on the same plane.">closestPointOnTriangle</a>(<span class="keyword">const</span> <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">core::vector3d&lt;T&gt;</a>&amp; p)<span class="keyword"> const</span>
<a name="l00069"></a>00069 <span class="keyword">        </span>{
<a name="l00070"></a>00070             <span class="keyword">const</span> <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">core::vector3d&lt;T&gt;</a> rab = <a class="code" href="classirr_1_1core_1_1line3d.html" title="3D line between two points with intersection methods.">line3d&lt;T&gt;</a>(<a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>, <a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a>).getClosestPoint(p);
<a name="l00071"></a>00071             <span class="keyword">const</span> <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">core::vector3d&lt;T&gt;</a> rbc = <a class="code" href="classirr_1_1core_1_1line3d.html" title="3D line between two points with intersection methods.">line3d&lt;T&gt;</a>(<a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a>, <a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">pointC</a>).getClosestPoint(p);
<a name="l00072"></a>00072             <span class="keyword">const</span> <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">core::vector3d&lt;T&gt;</a> rca = <a class="code" href="classirr_1_1core_1_1line3d.html" title="3D line between two points with intersection methods.">line3d&lt;T&gt;</a>(<a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">pointC</a>, <a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>).getClosestPoint(p);
<a name="l00073"></a>00073 
<a name="l00074"></a>00074             <span class="keyword">const</span> T d1 = rab.<a class="code" href="classirr_1_1core_1_1vector3d.html#afd81bdc7d165f0e2082155127c3005e2" title="Get distance from another point.">getDistanceFrom</a>(p);
<a name="l00075"></a>00075             <span class="keyword">const</span> T d2 = rbc.<a class="code" href="classirr_1_1core_1_1vector3d.html#afd81bdc7d165f0e2082155127c3005e2" title="Get distance from another point.">getDistanceFrom</a>(p);
<a name="l00076"></a>00076             <span class="keyword">const</span> T d3 = rca.<a class="code" href="classirr_1_1core_1_1vector3d.html#afd81bdc7d165f0e2082155127c3005e2" title="Get distance from another point.">getDistanceFrom</a>(p);
<a name="l00077"></a>00077 
<a name="l00078"></a>00078             <span class="keywordflow">if</span> (d1 &lt; d2)
<a name="l00079"></a>00079                 <span class="keywordflow">return</span> d1 &lt; d3 ? rab : rca;
<a name="l00080"></a>00080 
<a name="l00081"></a>00081             <span class="keywordflow">return</span> d2 &lt; d3 ? rbc : rca;
<a name="l00082"></a>00082         }
<a name="l00083"></a>00083 
<a name="l00085"></a>00085         <span class="comment">/*</span>
<a name="l00086"></a>00086 <span class="comment">        \param p Point to test. Assumes that this point is already</span>
<a name="l00087"></a>00087 <span class="comment">        on the plane of the triangle.</span>
<a name="l00088"></a>00088 <span class="comment">        \return True if the point is inside the triangle, otherwise false. */</span>
<a name="l00089"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#a2a35b829f8389c5548e19e28157979c9">00089</a>         <span class="keywordtype">bool</span> <a class="code" href="classirr_1_1core_1_1triangle3d.html#a2a35b829f8389c5548e19e28157979c9" title="Check if a point is inside the triangle (border-points count also as inside)">isPointInside</a>(<span class="keyword">const</span> <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;T&gt;</a>&amp; p)<span class="keyword"> const</span>
<a name="l00090"></a>00090 <span class="keyword">        </span>{
<a name="l00091"></a>00091             <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;f64&gt;</a> af64((<a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a>)<a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>.X, (<a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a>)<a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>.Y, (<a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a>)<a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>.Z);
<a name="l00092"></a>00092             <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;f64&gt;</a> bf64((<a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a>)<a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a>.X, (<a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a>)<a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a>.Y, (<a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a>)<a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a>.Z);
<a name="l00093"></a>00093             <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;f64&gt;</a> cf64((<a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a>)<a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">pointC</a>.X, (<a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a>)<a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">pointC</a>.Y, (<a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a>)<a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">pointC</a>.Z);
<a name="l00094"></a>00094             <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;f64&gt;</a> pf64((<a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a>)p.<a class="code" href="classirr_1_1core_1_1vector3d.html#a8c9ed06774dc668112bcefacb6e7732b" title="X coordinate of the vector.">X</a>, (<a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a>)p.<a class="code" href="classirr_1_1core_1_1vector3d.html#af8f87c2fe0ce717ade7c3d7419302fbd" title="Y coordinate of the vector.">Y</a>, (<a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a>)p.<a class="code" href="classirr_1_1core_1_1vector3d.html#ac2beb702e718c3579971348981b220ed" title="Z coordinate of the vector.">Z</a>);
<a name="l00095"></a>00095             <span class="keywordflow">return</span> (isOnSameSide(pf64, af64, bf64, cf64) &amp;&amp;
<a name="l00096"></a>00096                 isOnSameSide(pf64, bf64, af64, cf64) &amp;&amp;
<a name="l00097"></a>00097                 isOnSameSide(pf64, cf64, af64, bf64));
<a name="l00098"></a>00098         }
<a name="l00099"></a>00099 
<a name="l00101"></a>00101 
<a name="l00108"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#a80986af43b5a104bef2c75f74fcf7465">00108</a>         <span class="keywordtype">bool</span> <a class="code" href="classirr_1_1core_1_1triangle3d.html#a80986af43b5a104bef2c75f74fcf7465" title="Check if a point is inside the triangle (border-points count also as inside)">isPointInsideFast</a>(<span class="keyword">const</span> <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;T&gt;</a>&amp; p)<span class="keyword"> const</span>
<a name="l00109"></a>00109 <span class="keyword">        </span>{
<a name="l00110"></a>00110             <span class="keyword">const</span> <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;T&gt;</a> a = <a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">pointC</a> - <a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>;
<a name="l00111"></a>00111             <span class="keyword">const</span> <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;T&gt;</a> b = <a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a> - <a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>;
<a name="l00112"></a>00112             <span class="keyword">const</span> <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;T&gt;</a> c = p - <a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>;
<a name="l00113"></a>00113 
<a name="l00114"></a>00114             <span class="keyword">const</span> <a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a> dotAA = a.<a class="code" href="classirr_1_1core_1_1vector3d.html#a0b247d39047c0e51ff16d0118bb396ab" title="Get the dot product with another vector.">dotProduct</a>( a);
<a name="l00115"></a>00115             <span class="keyword">const</span> <a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a> dotAB = a.<a class="code" href="classirr_1_1core_1_1vector3d.html#a0b247d39047c0e51ff16d0118bb396ab" title="Get the dot product with another vector.">dotProduct</a>( b);
<a name="l00116"></a>00116             <span class="keyword">const</span> <a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a> dotAC = a.<a class="code" href="classirr_1_1core_1_1vector3d.html#a0b247d39047c0e51ff16d0118bb396ab" title="Get the dot product with another vector.">dotProduct</a>( c);
<a name="l00117"></a>00117             <span class="keyword">const</span> <a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a> dotBB = b.<a class="code" href="classirr_1_1core_1_1vector3d.html#a0b247d39047c0e51ff16d0118bb396ab" title="Get the dot product with another vector.">dotProduct</a>( b);
<a name="l00118"></a>00118             <span class="keyword">const</span> <a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a> dotBC = b.<a class="code" href="classirr_1_1core_1_1vector3d.html#a0b247d39047c0e51ff16d0118bb396ab" title="Get the dot product with another vector.">dotProduct</a>( c);
<a name="l00119"></a>00119 
<a name="l00120"></a>00120             <span class="comment">// get coordinates in barycentric coordinate system</span>
<a name="l00121"></a>00121             <span class="keyword">const</span> <a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a> invDenom =  1/(dotAA * dotBB - dotAB * dotAB);
<a name="l00122"></a>00122             <span class="keyword">const</span> <a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a> u = (dotBB * dotAC - dotAB * dotBC) * invDenom;
<a name="l00123"></a>00123             <span class="keyword">const</span> <a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a> v = (dotAA * dotBC - dotAB * dotAC ) * invDenom;
<a name="l00124"></a>00124 
<a name="l00125"></a>00125             <span class="comment">// We count border-points as inside to keep downward compatibility.</span>
<a name="l00126"></a>00126             <span class="comment">// Rounding-error also needed for some test-cases.</span>
<a name="l00127"></a>00127             <span class="keywordflow">return</span> (u &gt; -<a class="code" href="namespaceirr_1_1core.html#a9514dd34463a30102ef8836915cf9c4c">ROUNDING_ERROR_f32</a>) &amp;&amp; (v &gt;= 0) &amp;&amp; (u + v &lt; 1+<a class="code" href="namespaceirr_1_1core.html#a9514dd34463a30102ef8836915cf9c4c">ROUNDING_ERROR_f32</a>);
<a name="l00128"></a>00128 
<a name="l00129"></a>00129         }
<a name="l00130"></a>00130 
<a name="l00131"></a>00131 
<a name="l00133"></a>00133 
<a name="l00136"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#ab29f327aac047e9984256b11ace27318">00136</a>         <span class="keywordtype">bool</span> <a class="code" href="classirr_1_1core_1_1triangle3d.html#ab29f327aac047e9984256b11ace27318" title="Get an intersection with a 3d line.">getIntersectionWithLimitedLine</a>(<span class="keyword">const</span> <a class="code" href="classirr_1_1core_1_1line3d.html" title="3D line between two points with intersection methods.">line3d&lt;T&gt;</a>&amp; line,
<a name="l00137"></a>00137             <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;T&gt;</a>&amp; outIntersection)<span class="keyword"> const</span>
<a name="l00138"></a>00138 <span class="keyword">        </span>{
<a name="l00139"></a>00139             <span class="keywordflow">return</span> <a class="code" href="classirr_1_1core_1_1triangle3d.html#a8507e3af8385b006ca026173fad33506" title="Get an intersection with a 3d line.">getIntersectionWithLine</a>(line.<a class="code" href="classirr_1_1core_1_1line3d.html#a8874f77324b6ef6632e66b22051a3251" title="Start point of line.">start</a>,
<a name="l00140"></a>00140                 line.<a class="code" href="classirr_1_1core_1_1line3d.html#a1394b59b713cec4044259d1999bbcc80" title="Get vector of line.">getVector</a>(), outIntersection) &amp;&amp;
<a name="l00141"></a>00141                 outIntersection.<a class="code" href="classirr_1_1core_1_1vector3d.html#ace05ee3b68b47c2ec6baff0d9d64de98" title="Returns if this vector interpreted as a point is on a line between two other points.">isBetweenPoints</a>(line.<a class="code" href="classirr_1_1core_1_1line3d.html#a8874f77324b6ef6632e66b22051a3251" title="Start point of line.">start</a>, line.<a class="code" href="classirr_1_1core_1_1line3d.html#aea19cb33971bb20e1d736facdae8a8f0" title="End point of line.">end</a>);
<a name="l00142"></a>00142         }
<a name="l00143"></a>00143 
<a name="l00144"></a>00144 
<a name="l00146"></a>00146 
<a name="l00154"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#a8507e3af8385b006ca026173fad33506">00154</a>         <span class="keywordtype">bool</span> <a class="code" href="classirr_1_1core_1_1triangle3d.html#a8507e3af8385b006ca026173fad33506" title="Get an intersection with a 3d line.">getIntersectionWithLine</a>(<span class="keyword">const</span> <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;T&gt;</a>&amp; linePoint,
<a name="l00155"></a>00155             <span class="keyword">const</span> <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;T&gt;</a>&amp; lineVect, <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;T&gt;</a>&amp; outIntersection)<span class="keyword"> const</span>
<a name="l00156"></a>00156 <span class="keyword">        </span>{
<a name="l00157"></a>00157             <span class="keywordflow">if</span> (<a class="code" href="classirr_1_1core_1_1triangle3d.html#a0ac5455e0215040cc93475baa543303a" title="Calculates the intersection between a 3d line and the plane the triangle is on.">getIntersectionOfPlaneWithLine</a>(linePoint, lineVect, outIntersection))
<a name="l00158"></a>00158                 <span class="keywordflow">return</span> <a class="code" href="classirr_1_1core_1_1triangle3d.html#a2a35b829f8389c5548e19e28157979c9" title="Check if a point is inside the triangle (border-points count also as inside)">isPointInside</a>(outIntersection);
<a name="l00159"></a>00159 
<a name="l00160"></a>00160             <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00161"></a>00161         }
<a name="l00162"></a>00162 
<a name="l00163"></a>00163 
<a name="l00165"></a>00165 
<a name="l00169"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#a0ac5455e0215040cc93475baa543303a">00169</a>         <span class="keywordtype">bool</span> <a class="code" href="classirr_1_1core_1_1triangle3d.html#a0ac5455e0215040cc93475baa543303a" title="Calculates the intersection between a 3d line and the plane the triangle is on.">getIntersectionOfPlaneWithLine</a>(<span class="keyword">const</span> <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;T&gt;</a>&amp; linePoint,
<a name="l00170"></a>00170             <span class="keyword">const</span> <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;T&gt;</a>&amp; lineVect, <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;T&gt;</a>&amp; outIntersection)<span class="keyword"> const</span>
<a name="l00171"></a>00171 <span class="keyword">        </span>{
<a name="l00172"></a>00172             <span class="comment">// Work with f64 to get more precise results (makes enough difference to be worth the casts).</span>
<a name="l00173"></a>00173             <span class="keyword">const</span> <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;f64&gt;</a> linePointf64(linePoint.<a class="code" href="classirr_1_1core_1_1vector3d.html#a8c9ed06774dc668112bcefacb6e7732b" title="X coordinate of the vector.">X</a>, linePoint.<a class="code" href="classirr_1_1core_1_1vector3d.html#af8f87c2fe0ce717ade7c3d7419302fbd" title="Y coordinate of the vector.">Y</a>, linePoint.<a class="code" href="classirr_1_1core_1_1vector3d.html#ac2beb702e718c3579971348981b220ed" title="Z coordinate of the vector.">Z</a>);
<a name="l00174"></a>00174             <span class="keyword">const</span> <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;f64&gt;</a> lineVectf64(lineVect.<a class="code" href="classirr_1_1core_1_1vector3d.html#a8c9ed06774dc668112bcefacb6e7732b" title="X coordinate of the vector.">X</a>, lineVect.<a class="code" href="classirr_1_1core_1_1vector3d.html#af8f87c2fe0ce717ade7c3d7419302fbd" title="Y coordinate of the vector.">Y</a>, lineVect.<a class="code" href="classirr_1_1core_1_1vector3d.html#ac2beb702e718c3579971348981b220ed" title="Z coordinate of the vector.">Z</a>);
<a name="l00175"></a>00175             <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;f64&gt;</a> outIntersectionf64;
<a name="l00176"></a>00176 
<a name="l00177"></a>00177             <a class="code" href="classirr_1_1core_1_1triangle3d.html" title="3d triangle template class for doing collision detection and other things.">core::triangle3d&lt;irr::f64&gt;</a> trianglef64(<a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;f64&gt;</a>((<a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a>)<a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>.X, (<a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a>)<a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>.Y, (<a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a>)<a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>.Z)
<a name="l00178"></a>00178                                         ,<a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;f64&gt;</a>((<a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a>)<a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a>.X, (<a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a>)<a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a>.Y, (<a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a>)<a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a>.Z)
<a name="l00179"></a>00179                                         , <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;f64&gt;</a>((<a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a>)<a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">pointC</a>.X, (<a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a>)<a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">pointC</a>.Y, (<a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a>)<a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">pointC</a>.Z));
<a name="l00180"></a>00180             <span class="keyword">const</span> <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;irr::f64&gt;</a> normalf64 = trianglef64.<a class="code" href="classirr_1_1core_1_1triangle3d.html#a14298103d89ba5eae37d82d8556f07e2" title="Get the normal of the triangle.">getNormal</a>().normalize();
<a name="l00181"></a>00181             <a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a> t2;
<a name="l00182"></a>00182 
<a name="l00183"></a>00183             <span class="keywordflow">if</span> ( <a class="code" href="namespaceirr_1_1core.html#afc24e6ba26469ec7ca7001ed272dc3b2" title="returns if a equals zero, taking rounding errors into account">core::iszero</a> ( t2 = normalf64.<a class="code" href="classirr_1_1core_1_1vector3d.html#a0b247d39047c0e51ff16d0118bb396ab" title="Get the dot product with another vector.">dotProduct</a>(lineVectf64) ) )
<a name="l00184"></a>00184                 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00185"></a>00185 
<a name="l00186"></a>00186             <a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a> d = trianglef64.<a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>.dotProduct(normalf64);
<a name="l00187"></a>00187             <a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a> t = -(normalf64.<a class="code" href="classirr_1_1core_1_1vector3d.html#a0b247d39047c0e51ff16d0118bb396ab" title="Get the dot product with another vector.">dotProduct</a>(linePointf64) - d) / t2;
<a name="l00188"></a>00188             outIntersectionf64 = linePointf64 + (lineVectf64 * t);
<a name="l00189"></a>00189 
<a name="l00190"></a>00190             outIntersection.<a class="code" href="classirr_1_1core_1_1vector3d.html#a8c9ed06774dc668112bcefacb6e7732b" title="X coordinate of the vector.">X</a> = (T)outIntersectionf64.<a class="code" href="classirr_1_1core_1_1vector3d.html#a8c9ed06774dc668112bcefacb6e7732b" title="X coordinate of the vector.">X</a>;
<a name="l00191"></a>00191             outIntersection.<a class="code" href="classirr_1_1core_1_1vector3d.html#af8f87c2fe0ce717ade7c3d7419302fbd" title="Y coordinate of the vector.">Y</a> = (T)outIntersectionf64.<a class="code" href="classirr_1_1core_1_1vector3d.html#af8f87c2fe0ce717ade7c3d7419302fbd" title="Y coordinate of the vector.">Y</a>;
<a name="l00192"></a>00192             outIntersection.<a class="code" href="classirr_1_1core_1_1vector3d.html#ac2beb702e718c3579971348981b220ed" title="Z coordinate of the vector.">Z</a> = (T)outIntersectionf64.<a class="code" href="classirr_1_1core_1_1vector3d.html#ac2beb702e718c3579971348981b220ed" title="Z coordinate of the vector.">Z</a>;
<a name="l00193"></a>00193             <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00194"></a>00194         }
<a name="l00195"></a>00195 
<a name="l00196"></a>00196 
<a name="l00198"></a>00198 
<a name="l00199"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#a14298103d89ba5eae37d82d8556f07e2">00199</a>         <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;T&gt;</a> <a class="code" href="classirr_1_1core_1_1triangle3d.html#a14298103d89ba5eae37d82d8556f07e2" title="Get the normal of the triangle.">getNormal</a>()<span class="keyword"> const</span>
<a name="l00200"></a>00200 <span class="keyword">        </span>{
<a name="l00201"></a>00201             <span class="keywordflow">return</span> (<a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a> - <a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>).crossProduct(<a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">pointC</a> - <a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>);
<a name="l00202"></a>00202         }
<a name="l00203"></a>00203 
<a name="l00205"></a>00205 
<a name="l00210"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#acec0805b8512d9c3b0d5fe4b2cdb8562">00210</a>         <span class="keywordtype">bool</span> <a class="code" href="classirr_1_1core_1_1triangle3d.html#acec0805b8512d9c3b0d5fe4b2cdb8562" title="Test if the triangle would be front or backfacing from any point.">isFrontFacing</a>(<span class="keyword">const</span> <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;T&gt;</a>&amp; lookDirection)<span class="keyword"> const</span>
<a name="l00211"></a>00211 <span class="keyword">        </span>{
<a name="l00212"></a>00212             <span class="keyword">const</span> <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;T&gt;</a> n = <a class="code" href="classirr_1_1core_1_1triangle3d.html#a14298103d89ba5eae37d82d8556f07e2" title="Get the normal of the triangle.">getNormal</a>().normalize();
<a name="l00213"></a>00213             <span class="keyword">const</span> <a class="code" href="namespaceirr.html#a0277be98d67dc26ff93b1a6a1d086b07" title="32 bit floating point variable.">f32</a> d = (<a class="code" href="namespaceirr.html#a0277be98d67dc26ff93b1a6a1d086b07" title="32 bit floating point variable.">f32</a>)n.<a class="code" href="classirr_1_1core_1_1vector3d.html#a0b247d39047c0e51ff16d0118bb396ab" title="Get the dot product with another vector.">dotProduct</a>(lookDirection);
<a name="l00214"></a>00214             <span class="keywordflow">return</span> <a class="code" href="irr_math_8h.html#a26bc42a9cc1fc775bc588052c32ff9a0">F32_LOWER_EQUAL_0</a>(d);
<a name="l00215"></a>00215         }
<a name="l00216"></a>00216 
<a name="l00218"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#a8cec7cdb0c9caa0b41f819eac2ad51aa">00218</a>         <a class="code" href="classirr_1_1core_1_1plane3d.html" title="Template plane class with some intersection testing methods.">plane3d&lt;T&gt;</a> <a class="code" href="classirr_1_1core_1_1triangle3d.html#a8cec7cdb0c9caa0b41f819eac2ad51aa" title="Get the plane of this triangle.">getPlane</a>()<span class="keyword"> const</span>
<a name="l00219"></a>00219 <span class="keyword">        </span>{
<a name="l00220"></a>00220             <span class="keywordflow">return</span> <a class="code" href="classirr_1_1core_1_1plane3d.html" title="Template plane class with some intersection testing methods.">plane3d&lt;T&gt;</a>(<a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>, <a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a>, <a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">pointC</a>);
<a name="l00221"></a>00221         }
<a name="l00222"></a>00222 
<a name="l00224"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#a2394228f2da6063eb8fedf1f3da9facc">00224</a>         T <a class="code" href="classirr_1_1core_1_1triangle3d.html#a2394228f2da6063eb8fedf1f3da9facc" title="Get the area of the triangle.">getArea</a>()<span class="keyword"> const</span>
<a name="l00225"></a>00225 <span class="keyword">        </span>{
<a name="l00226"></a>00226             <span class="keywordflow">return</span> (<a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a> - <a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>).crossProduct(<a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">pointC</a> - <a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>).getLength() * 0.5f;
<a name="l00227"></a>00227 
<a name="l00228"></a>00228         }
<a name="l00229"></a>00229 
<a name="l00231"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#aebcd3f29fcbf9008dac95810c81f152c">00231</a>         <span class="keywordtype">void</span> <span class="keyword">set</span>(<span class="keyword">const</span> <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">core::vector3d&lt;T&gt;</a>&amp; a, <span class="keyword">const</span> <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">core::vector3d&lt;T&gt;</a>&amp; b, <span class="keyword">const</span> <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">core::vector3d&lt;T&gt;</a>&amp; c)
<a name="l00232"></a>00232         {
<a name="l00233"></a>00233             <a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a> = a;
<a name="l00234"></a>00234             <a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a> = b;
<a name="l00235"></a>00235             <a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">pointC</a> = c;
<a name="l00236"></a>00236         }
<a name="l00237"></a>00237 
<a name="l00239"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b">00239</a>         <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;T&gt;</a> <a class="code" href="classirr_1_1core_1_1triangle3d.html#ad4113299162b5855bccf8465b31ff78b" title="the three points of the triangle">pointA</a>;
<a name="l00240"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">00240</a>         <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;T&gt;</a> <a class="code" href="classirr_1_1core_1_1triangle3d.html#a3ed5276e50f3d3b6a1e2483dffa822ac">pointB</a>;
<a name="l00241"></a><a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">00241</a>         <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;T&gt;</a> <a class="code" href="classirr_1_1core_1_1triangle3d.html#a08e65517102b6d04f0537b876e152466">pointC</a>;
<a name="l00242"></a>00242 
<a name="l00243"></a>00243     <span class="keyword">private</span>:
<a name="l00244"></a>00244         <span class="comment">// Using f64 instead of &lt;T&gt; to avoid integer overflows when T=int (maybe also less floating point troubles).</span>
<a name="l00245"></a>00245         <span class="keywordtype">bool</span> isOnSameSide(<span class="keyword">const</span> <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;f64&gt;</a>&amp; p1, <span class="keyword">const</span> <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;f64&gt;</a>&amp; p2,
<a name="l00246"></a>00246             <span class="keyword">const</span> <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;f64&gt;</a>&amp; a, <span class="keyword">const</span> <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;f64&gt;</a>&amp; b)<span class="keyword"> const</span>
<a name="l00247"></a>00247 <span class="keyword">        </span>{
<a name="l00248"></a>00248             <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;f64&gt;</a> bminusa = b - a;
<a name="l00249"></a>00249             <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;f64&gt;</a> cp1 = bminusa.<a class="code" href="classirr_1_1core_1_1vector3d.html#aa2470a12e1ef53f440c95df6249e9aa4" title="Calculates the cross product with another vector.">crossProduct</a>(p1 - a);
<a name="l00250"></a>00250             <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;f64&gt;</a> cp2 = bminusa.<a class="code" href="classirr_1_1core_1_1vector3d.html#aa2470a12e1ef53f440c95df6249e9aa4" title="Calculates the cross product with another vector.">crossProduct</a>(p2 - a);
<a name="l00251"></a>00251             <a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a> res = cp1.<a class="code" href="classirr_1_1core_1_1vector3d.html#a0b247d39047c0e51ff16d0118bb396ab" title="Get the dot product with another vector.">dotProduct</a>(cp2);
<a name="l00252"></a>00252             <span class="keywordflow">if</span> ( res &lt; 0 )
<a name="l00253"></a>00253             {
<a name="l00254"></a>00254                 <span class="comment">// This catches some floating point troubles.</span>
<a name="l00255"></a>00255                 <span class="comment">// Unfortunately slightly expensive and we don&#39;t really know the best epsilon for iszero.</span>
<a name="l00256"></a>00256                 <a class="code" href="classirr_1_1core_1_1vector3d.html" title="3d vector template class with lots of operators and methods.">vector3d&lt;f64&gt;</a> cp1 = bminusa.<a class="code" href="classirr_1_1core_1_1vector3d.html#a84a1861464ef70e6965c146732103c09" title="Normalizes the vector.">normalize</a>().crossProduct((p1 - a).normalize());
<a name="l00257"></a>00257                 <span class="keywordflow">if</span> (    <a class="code" href="namespaceirr_1_1core.html#afc24e6ba26469ec7ca7001ed272dc3b2" title="returns if a equals zero, taking rounding errors into account">core::iszero</a>(cp1.<a class="code" href="classirr_1_1core_1_1vector3d.html#a8c9ed06774dc668112bcefacb6e7732b" title="X coordinate of the vector.">X</a>, (<a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a>)<a class="code" href="namespaceirr_1_1core.html#a9514dd34463a30102ef8836915cf9c4c">ROUNDING_ERROR_f32</a>)
<a name="l00258"></a>00258                     &amp;&amp;  <a class="code" href="namespaceirr_1_1core.html#afc24e6ba26469ec7ca7001ed272dc3b2" title="returns if a equals zero, taking rounding errors into account">core::iszero</a>(cp1.<a class="code" href="classirr_1_1core_1_1vector3d.html#af8f87c2fe0ce717ade7c3d7419302fbd" title="Y coordinate of the vector.">Y</a>, (<a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a>)ROUNDING_ERROR_f32)
<a name="l00259"></a>00259                     &amp;&amp;  <a class="code" href="namespaceirr_1_1core.html#afc24e6ba26469ec7ca7001ed272dc3b2" title="returns if a equals zero, taking rounding errors into account">core::iszero</a>(cp1.<a class="code" href="classirr_1_1core_1_1vector3d.html#ac2beb702e718c3579971348981b220ed" title="Z coordinate of the vector.">Z</a>, (<a class="code" href="namespaceirr.html#a1325b02603ad449f92c68fc640af9b28" title="64 bit floating point variable.">f64</a>)ROUNDING_ERROR_f32) )
<a name="l00260"></a>00260                 {
<a name="l00261"></a>00261                     res = 0.f;
<a name="l00262"></a>00262                 }
<a name="l00263"></a>00263             }
<a name="l00264"></a>00264             <span class="keywordflow">return</span> (res &gt;= 0.0f);
<a name="l00265"></a>00265         }
<a name="l00266"></a>00266     };
<a name="l00267"></a>00267 
<a name="l00268"></a>00268 
<a name="l00270"></a><a class="code" href="namespaceirr_1_1core.html#a1112835405bbec5dadf031dc7934e7d0">00270</a>     <span class="keyword">typedef</span> <a class="code" href="classirr_1_1core_1_1triangle3d.html" title="3d triangle template class for doing collision detection and other things.">triangle3d&lt;f32&gt;</a> <a class="code" href="namespaceirr_1_1core.html#a1112835405bbec5dadf031dc7934e7d0" title="Typedef for a f32 3d triangle.">triangle3df</a>;
<a name="l00271"></a>00271 
<a name="l00273"></a><a class="code" href="namespaceirr_1_1core.html#a72a3206800849803d401d34764c40c21">00273</a>     <span class="keyword">typedef</span> <a class="code" href="classirr_1_1core_1_1triangle3d.html" title="3d triangle template class for doing collision detection and other things.">triangle3d&lt;s32&gt;</a> <a class="code" href="namespaceirr_1_1core.html#a72a3206800849803d401d34764c40c21" title="Typedef for an integer 3d triangle.">triangle3di</a>;
<a name="l00274"></a>00274 
<a name="l00275"></a>00275 } <span class="comment">// end namespace core</span>
<a name="l00276"></a>00276 } <span class="comment">// end namespace irr</span>
<a name="l00277"></a>00277 
<a name="l00278"></a>00278 <span class="preprocessor">#endif</span>
<a name="l00279"></a>00279 <span class="preprocessor"></span>
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